South Dakota Highway 21
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| Highway 21 |
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| Length: | 9.5 mi (15 km) | ||||||||
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| Formed: | 1926 | ||||||||
| South end: |  Lake Norden |
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| North end: |  East of Hayti |
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| Major cities: | Lake Norden, Hayti | ||||||||
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South Dakota Highway 21 is a short state route in east central South Dakota. The southwest end is located at the junction with South Dakota Highway 28 on the west edge of Lake Norden. After running northward to Hayti, it is routed east to end at the junction with U.S. Highway 81. It is 9.5 miles (15 kilometers) in length.
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[edit] History
The original South Dakota 21 was in place when the U.S. highway system was implemented in 1926. At that time, U.S. Highway 81 was assigned to the route of SD 21, and both numbers shared the road. When U.S. 81 in this area was rerouted a few miles east, SD 21 was kept on the old alignment, and has remained in place since.
[edit] List of Counties
South Dakota 21 currently is only located in Hamlin County.
[edit] Legal Definition
The route of SD 21 is defined in South Dakota Codified Laws ยง 31-4-146.[1]
